KR100769885B1 - The speaker - Google Patents

Abstract

An acoustic transducer is provided to improve sound quality by installing more than two output units in a limited space to obtain outputs of different levels in units. An acoustic transducer includes a first coil(C1), a second coil(C2), and first and second diaphragms(12,13). The first coil(C1) and the second coil(C2) with different diameters electromagnetically react in a magnetic field according to alternate signals supplied from an external sound source. The first and second diaphragms(11) with different diameters are fixed according to the diameters of the first and second coils(C1,C2), and independently vibrate. An outer circumference of the first diaphragm(12) with the large diameter is elastically fixed at a frame(F1), and a center thereof is perforated. An outer circumference of the second diaphragm(13) with the small diameter is elastically fixed to the perforated inner diameter part of the first diaphragm(12). The first coil(C1) and the second coil(C2) which vibrates each diaphragm(12,13), are elastically supported by a damper(D).

Description

Electronic Sound Transducer {THE SPEAKER}

1 is a cross-sectional view showing the structure of the present invention according to one embodiment (2-way mode).

Figure 2 is a cross-sectional view showing the structure of the present invention according to another embodiment (connection structure of each diaphragm).

3 is a cross-sectional view showing the structure of the present invention according to another embodiment (magnetic circuit top state).

4 is a cross-sectional view showing the structure of the present invention according to another embodiment (3-WAY mode).

5 is a cross-sectional view showing the structure of the present invention according to another embodiment (micro speaker structure).

      <Description of Signs of Major Parts of Drawings>

10: electroacoustic transducer 11: diaphragm

12,13,14: diaphragm 1,2,3 12a, 13a, 14a: edge 1,2,3

C: coils C1, C2, C3: coils 1,2,3

M1, M2, M3: Magnet 1,2,3 T1, T2, T3: Top plate 1,2,3

Y: York Y1, Y2: Round Jaw 1,2

S1, S2: Air gap 1,2 F1: Frame

F2: Case

The present invention relates to an electroacoustic transducer, and more particularly, to an electroacoustic transducer such as a speaker (including a receiver) for converting an electrical signal input from a signal source into a mechanical signal and outputting sound.

BACKGROUND ART In general, an electroacoustic transducer includes a speaker, a receiver, a buzzer, and the like capable of outputting voice and sound, and is largely classified into a vibration generating device for generating a three-dimensional sound by generating vibration force as well as sound.

Here, the speaker (including a receiver) is a device that converts an input frequency signal into a sound and outputs it. A voice coil existing between the voids by Fleming's left-hand law that a current-carrying conductor is subjected to a force in a magnetic field. By converting electrical energy into mechanical energy.

That is, when a current signal including several frequencies is applied to the voice coil, the voice coil generates mechanical energy according to the strength of the current and the magnitude of the frequency, and generates vibration on the residual plate attached to the voice coil. Ultimately, the human ear generates sound pressure of a predetermined magnitude.

Among these sound pressures, relatively low sound pressure is generated and used close to the human ear is often called a receiver, whereas the relatively high sound pressure is used for a certain distance from the human ear. ).

The magnetic circuit of such a speaker uses magnetic magnets and top plates in a yoke made of ferrous metal so that magnetic flux can be crossed at right angles to the voice coil existing in the void. It is designed so that the voice coil is bonded to the diaphragm to generate the up and down excitation force by the input signal to vibrate the diaphragm bound to the frame to generate sound pressure.

The diaphragm has various shapes of waves in order to remove excellent buckling and buckling during vertical vibration, and the shape of the diaphragm serves as a design variable having the greatest influence on frequency characteristics.

Such a speaker has not changed much in its structure for a long time, but in recent years, small and light weight has been continued in response to the commercialization of high-energy permanent magnets, the development of molding technology for micro structures, and the miniaturization and light weight in the information and communication field. And high performance is being realized, and even in the development of such technology, the miniaturization of the electronic acoustic transducer and the electronic apparatus including the same has been an obstacle to limit the improvement of the output characteristics of the speaker and a problem to be solved.

In particular, in the case of a speaker that improves sound quality by outputting sound by dividing the sound into high, mid, and bass, each speaker is provided in an enclosure-shaped cabinet, and thus there is a structural problem inevitably increased in volume.

In addition, recently, an electromagnetic acoustic transducer including two magnetic circuits and a vibration structure in a single frame supporting and supporting the magnetic circuit and the vibration structure has been introduced. However, the conventional multi-electromagnetic transducer has a vibration structure in opposite directions. Since the vibration force is attenuated at the same time, the vibration force is attenuated, thereby reducing the output efficiency compared to the input signal or power consumption.

The present invention for solving this problem is to install two or more output units in a limited space (narrow space) to obtain different levels of output from each unit, while the diaphragm of each unit is directed to one side It is therefore an object of the present invention to provide an electroacoustic transducer which minimizes attenuation of vibrations as each unit operates simultaneously.

The present invention for achieving the above object is an electron-acoustic transducer having a magnetic circuit for converting electrical energy into mechanical energy by the Fleming's left-hand law that a conductor in which current flows in the magnetic field is subjected to a force. Coils of different diameters in electromagnetic response in a magnetic field according to the alternating signals supplied; And diaphragms having different diameters, each fixed according to the diameters of the coils 1 and 2, having concentric circles and independently vibrating on the same line. To provide, but to provide a diaphragm 2 having a small diameter in the center portion of the diaphragm 1 (12) of the larger diameter of the diaphragm.

The present invention configured as described above has two or more output units in a limited space, that is, two or more magnetic circuits and two or more vibration structures to obtain different levels of output from each unit, thereby producing sound at high, mid, and low levels. It can be separated to improve sound quality, and the structure that implements this function can be simplified and slimmed.

In addition, the diaphragm of each unit is directed in one direction, thereby minimizing the attenuation of vibration as each unit operates at the same time, thereby improving the output efficiency compared to the input signal or power consumption.

Before describing the present invention, the drawings are referred to the description of the present invention, Figure 1 is a cross-sectional view showing the structure of the present invention according to an embodiment (2-WAY method), Figure 2 is the structure of the present invention Is a cross-sectional view according to another embodiment (connection structure of each diaphragm), Figure 3 is a cross-sectional view showing a structure of the present invention according to another embodiment (magnetic circuit mounting state), Figure 4 is a view of the present invention The structure is shown in cross-sectional view according to another embodiment (3-WAY mode), and FIG. 5 is shown in cross-sectional view showing the structure of the present invention according to another embodiment (micro speaker structure).

The present invention will be described below with reference to the accompanying drawings presented as above.

First, as an embodiment of the present invention, as shown in FIG. 1, a magnetic circuit converting electrical energy into mechanical energy by Fleming's left-hand law, in which a current-carrying conductor is subjected to a force in a magnetic field. An electroacoustic transducer having: coils (1) and (2) (C1) (C2) having different diameters which electromagnetically react in a magnetic field according to an alternating signal supplied from an external sound source; And diaphragms 11 of different diameters, which are fixed according to the diameters of the coils 1 and 2 (C1) and C2, respectively having concentric circles and positioned on the same line and vibrating independently. ) To provide a diaphragm 2 (13) having a small diameter at the center of the diaphragm 1 (12) having a large diameter.

Here, in the present invention, the magnetic circuit may include, for example, a yoke (Y) having a center (Y1) formed therein; Magnets 1, 2 (M1) (M2) and top plates 1, 2 (T1) (T2) laminates are formed such that voids 1, 2 (S1) (S2) are formed on the outer and inner circumferential surfaces of the yoke (Y1) of the yoke. It may be provided so as to space each other, so that the magnetic flux is intersected at right angles to the coil 1, 2 (C1) (C2) located in the voids 1, 2 (S1) (S2), this structure is implemented in the present invention The description will be made by way of example.

At this time, the central portion of each of the diaphragm 1, 2 (12, 13) is coupled to one end of the coil 1, 2 (C1) (C2) to provide a vibration structure, coil 1, 2 (C1) ( The combination of C2) and the diaphragm 1, 2 (12) 13 may be directly bonded through an adhesive, or may be wound and bonded to the bobbin.

On the other hand, in the present invention, the outer circumference of the diaphragm 1 (12) having a large diameter is fixed to the frame (F1) and the center portion is perforated, so that the outer circumferential portion of the diaphragm 2 (13) having a small diameter on the perforated inner diameter portion. The outer periphery of the diaphragm 1 (12) having a large diameter may be fixed to the frame F1, and the center portion may be punctured, and the diaphragm 2 (13) having a small diameter may be fixed to the diaphragm 1 (12). The coil 2 (C2) positioned above and vibrating the diaphragm 2 (13) may be installed downward through the perforated portion of the diaphragm 1 (12), and the diaphragm 11 having different diameters may be freely spaced. The damper D may be supported by the damper D so as to be positioned without restraint, and each of the coils C to vibrate each of the diaphragms 11.

In this case, the damper (D) may be fixed to the frame (F1) to support the coil portion (C), each damper (D) of the diaphragm 1, 2 (12) 13 support the ball, Each damper D may be fixed to the top plates 1 and 2 (T1) and T2 to support the diaphragms 1 and 2 (12) and 13 in an elastic manner.

In addition, the outer circumference of the diaphragm 1 (12) having a large diameter is fixed to the frame F1 and the center portion is punctured, and the outer circumference of the small diaphragm 2 (13) is fixed to the perforated inner diameter portion. The coils 1, 2 (C1) and C2, which vibrate the diaphragms 1, 2 (12) and 13, may be fixed to the frame F1 through the damper D.

At this time, the coils 1 and 2 (C1) and C2 may be wound around the bobbin, and the damper D may be connected to the bobbin to support the frame F1 with shot force.

On the other hand, the diaphragm 1 (12) of the present invention, for example, the edge 1 (12a) is provided on the outer peripheral portion, is fixed to be resilient to the frame (F1), it can be vibrated while blowing within a limited vibration width.

At this time, the edge 1 (12a) is, for example, may be a curved carbon support in the cross-section, made of a coated paper material, or may be a spring in the shape of a plate, the bullet is a paper material coated with the edge 1 (12a) In the case of a support, the outer periphery of the diaphragm 1 (12) and the open end of the frame F1 may be adhesively fixed through an adhesive, and in the case of a spring having a plate shape, the outer periphery and the frame F1 of the diaphragm 1 (12). It may be adhesively fixed to the open end of the adhesive through an adhesive, it may be heat-sealed fixed.

At this time, the frame (F1) is, for example, the outer periphery of the edge 1 (12a) of the diaphragm 1 (12) is fixed, and narrowly extended in a horn shape from one side end of the gasket, the surface of the top plate 1 (T1) It may be fixed, may be fixed to the magnet 1 (M1), may be fixed to the yoke (Y).

On the other hand, the diaphragm 2 (12) in the present invention, for example, the edge 2 (13a) is provided on the outer peripheral portion, is fixed to the elastic plate 1 (12) to be resilient, it can be vibrated while blowing within a limited vibration width. .

At this time, the edge 2 (13a) may be, for example, a carbon support supporting the cross-sectional curved irregularities made of a coated paper material, may be a plate-shaped spring, the edge 2 (13a) is coated In the case of the carbon support body, the outer periphery of the diaphragm 2 (13) and the inner periphery of the diaphragm 1 (12) may be adhesively fixed through an adhesive. And it may be adhesively fixed to the inner peripheral portion of the diaphragm 1 (12) through an adhesive, it may be heat-sealed fixed.

At this time, in particular, the edge portion which supports the elastic plate while connecting the diaphragm and the diaphragm is provided close to the plane so that grooves are not formed, as shown in FIG. 2 (here, the plane is smooth or straight without any uneven shape) In this case, it is possible to prevent the distortion (noise) of the output characteristics that can appear in the embodiment shown in Figure 1 of the accompanying drawings.

That is, in the embodiment illustrated in FIG. 1, the edge 2 (13a) which supports the diaphragm 2 (13) with respect to the diaphragm 1 (12) while connecting the diaphragm 1 (12) and the diaphragm 2 (13) is upward. Since the groove is formed between the diaphragm 1 (12) while standing, the distortion may occur when the vibration in the portion, but in another embodiment shown in Figure 2 the groove portion between the diaphragm 1 (12) It is not formed and no distortion occurs.

Meanwhile, the magnet 1 (M1) and the top plate 1 (T1) are, for example, annular permanent magnets and iron pieces, and the space 1 (S1) in which the coil 1 (C1) is located with respect to the outer circumference of the yoke (Y1) of the yoke. It may be spaced apart by the interval to form a) can be fixed on the surface of the yoke (Y), the magnet 2 (M2) and the top plate 2 (T2), for example, as a circular block-shaped permanent magnet and iron pieces, the yoke of the yoke (Y1) It may be spaced apart by an interval forming the gap 2 (S2) in which the coil 2 (C2) is located with respect to the inner circumference and may be seated and fixed on the surface of the yoke (Y).

On the other hand, the yoke (Y) is made of, for example, Fe or Al or Cu, or a compound thereof, the outer periphery protruding in the same direction as the round jaw (Y1), the case-type one to surround the magnet and the top plate In addition, as shown in the accompanying drawings, it may be accommodated in a separate case (F2).

When the alternating signal is input to the coil 1 (C1) from the external sound source, the coil 1 (C1) is a laminate of the magnet 1 (M1) and the top plate 1 (T1) and the yoke (Y). In the magnetic field formed in the void 1 (S1) between the outer circumferential surface of the annulus (Y1) of the electromagnetic wave to vibrate up and down, at this time, the diaphragm 1 (12) is fixed to the end portion of the coil 1 (C1) While vibrating, it outputs sound, ie bass.

At this time, when the alternating signal is input to the coil 2 (C2), the coil 2 (C2) is a gap between the stack of the magnet 2 (M2) and the top plate 2 (T2) and the inner peripheral surface of the yoke (Y2) inner peripheral surface In the magnetic field formed in (S2) it is electromagnetically vibrated up and down, and at this time, the diaphragm 2 (13) is fixed to the end portion of the coil 2 (C2) while the vibration vibrating the sound, that is, high sound It works in a 2-way way.

According to another embodiment of the present invention, as shown in FIG. 4, a diaphragm 3 14 is provided between the diaphragm 1 12 for outputting low sound and the diaphragm 2 13 for outputting high sound. That is, the outer circumferential portion is fixed to the inner circumferential portion of the diaphragm 1 (12) through the edge 3 (14a) and is elastically supported, and the inner circumferential portion is an edge 13a provided on the outer circumferential portion of the diaphragm 2 (13). It is configured to support, and further provided with a separate annulus (Y2) between the annulus (Y1) and the protruding outer peripheral portion of the yoke (Y), the diaphragm 3 (14) is a magnet 3 (M3) and top plate 3 It can also be made to vibrate by the coil 3 (C3) located in the space 3 (S3) between the stack of (T3) and the outer peripheral surface of the annular step (Y1). In this case, the coil 1 (C1) is located in the air gap 1 (S1) between the outer peripheral surface of the round jaw 2 (Y2) and the magnet 1 (M1) and the top plate 1 (T1).

In this case, an alternating signal supplied from an external sound source unit is applied to each coil, and vibrates, i.e., diaphragm 1 (12) in response to a magnetic field in a gap formed between the stack of the magnet and the top plate and the annulus of the yoke. ) Works as a 3-way way to output low sound, diaphragm 2 (13) high sound, vibrating plate 3 (14) middle sound.

Meanwhile, as another embodiment of the present invention, as shown in the accompanying drawings, it may be applied to the vibration structure and the magnetic circuit of the microspeaker. In this case, the earphone or the mobile phone / MP3 to which the microspeaker is applied Applied to a personal communication terminal such as a personal computer or a portable terminal such as a game machine, a PMP, an electronic dictionary, etc., the sound close to the original sound can be output.

In particular, when the present invention is applied to earphones, since a speaker (receiver) must be installed in a very limited narrow area, the speaker functions ranging from tweeter to woofer, which are treble, are combined into one unit, that is, output from one unit. This was impossible, and even if possible, the problem that the output characteristics were extremely poor can be solved.

For reference, in the general speaker, the channel divider is mounted in the system, but in the case of the earphone, it is difficult to install in the earphone, so it is separately configured or mounted in the controller or the output device. In this case, the channel divider is commonly referred to as a network, and the network divides a play signal to each unit in a multi-unit speaker system of 2-WAY or more, and the signal of the sound source unit is applied to the present invention through the channel divider. At this time, the controller can adjust the level of the high, mid and low to suit the user's preference.

While the invention has been described and illustrated in connection with a preferred embodiment for illustrating the principles of the invention, the invention is not limited to the configuration and operation as such is shown and described.

Rather, it will be apparent to those skilled in the art that many changes and modifications to the present invention are possible without departing from the spirit and scope of the appended claims.

Accordingly, all such suitable changes and modifications and equivalents should be considered to be within the scope of the present invention.

The present invention thus achieved by installing two or more output units in a limited space to obtain a different level of output from each unit, it is possible to improve the sound quality by separating the sound into high, mid, low bass, and implements this function The effect of simplifying and slimming the structure can be obtained.

In addition, the diaphragm of each unit is directed in one direction, thereby minimizing the attenuation of vibration due to the simultaneous operation of each unit, it is possible to obtain an effect of improving the output efficiency compared to the input signal or power consumption.

Claims (21)

In an electroacoustic transducer having a magnetic circuit that converts electrical energy into mechanical energy according to Fleming's left-hand law that a current-carrying conductor is subjected to a force in a magnetic field, the magnetic field velocity depends on an alternating signal supplied from an external sound source. Coils of different diameters reacting electromagnetically at (1) (C1) (C2); And diaphragm 11 having different diameters, each of which is fixed according to the diameter of the coils 1 and 2 (C1) and C2, having concentric circles and independently vibrating in a free space. The outer circumference of the diaphragm 1 (12) is elastically fixed to the frame F1 and the center portion is punctured to fix the outer circumferential portion of the diaphragm 2 (13) having a small diameter to the perforated inner diameter portion, and each of the diaphragms vibrates An electroacoustic transducer, characterized in that the damper (D) supports the coil 1, 2 (C1) and (C2) portions to be shot. 2. The magnetic circuit of claim 1, wherein the magnetic circuit comprises: a yoke (Y) having a center (Y1) formed therein; Magnets 1, 2 (M1) (M2) and top plates 1, 2 (T1) (T2) laminates are formed such that voids 1, 2 (S1) (S2) are formed on the outer and inner circumferential surfaces of the yoke (Y1) of the yoke. Electromagnetic transducers are provided so as to be spaced apart, so that the magnetic flux is interlinked at right angles to the coil 1, 2 (C1) (C2) located in the voids 1, 2 (S1) (S2). delete  According to claim 1, wherein the outer periphery of the diaphragm 1 (12) having a large diameter is fixed to the frame (F1) and the center portion is punctured, while the diaphragm 2 (13) having a small diameter above the diaphragm 1 (12) And a coil 2 (C2) for vibrating the diaphragm 2 (13) to be installed downward through the perforated portion of the diaphragm 1 (12). delete The electroacoustic transducer as claimed in claim 1, wherein the damper (D) is fixed to the frame (F1) to support the coils 1, 2 (C1) and (C2). The damper (D) supports the diaphragm 1, 2 (12) and 13, and both ends of the damper (D) are fixed to the top plates 1 (2) (T1) and (T2), respectively. Electroacoustic transducers. The outer circumferential portion of the diaphragm 2 (13) of claim 1, wherein the outer circumference of the diaphragm 1 (12) having a large diameter is elastically fixed to the frame F1, and the center portion is punctured. And a coil 1, 2 (C1) (C2) portion which vibrates the diaphragm 1, 2 (12, 13) to the frame (F1) through a damper (D). Acoustic transducer. 2. An electroacoustic transducer as set forth in claim 1, wherein said coils (1) and (2) are wound around bobbins. 2. The electroacoustic transducer as claimed in claim 1, wherein the damper (D) is coupled to the bobbin in which coils 1 (2) (C1) and (C2) are wound to support the frame (F1). 2. The electroacoustic transducer according to claim 1, wherein a central structure of each of the diaphragms 1, 2 (12) and 13 is coupled to one end of the coils 1, 2 (C1) and (C2). . 2. The electroacoustic transducer according to claim 1, wherein the diaphragm 1 (12) is provided with an edge 1 (12a) on an outer circumferential portion thereof and is elastic against the frame (F1). 13. The electroacoustic transducer as set forth in claim 12, wherein the edge 1 (12a) is a curved bullet support in cross section. delete The electroacoustic transducer according to claim 1, wherein the diaphragm 2 (12) is provided with an edge 2 (13a) at an outer circumferential portion thereof and fixed to the diaphragm 1 (12). The magnet 1 (M1) and the top plate 1 (T1) are annular permanent magnets and iron pieces, and the space 1 (coil 1 (C1) is located with respect to the outer circumference of the yoke (Y1) of the yoke). Electro-acoustic transducer characterized in that the clearance is spaced by the interval forming S1) and seated and fixed on the surface of the yoke (Y). The magnet 2 (M2) and the top plate 2 (T2) are circular block-shaped permanent magnets and iron pieces, and the space in which the coil 2 (C2) is located with respect to the inner circumference of the yoke (Y1) of the yoke. Electro-acoustic transducer, characterized in that seated on the surface of the yoke (Y) so as to be spaced apart by the interval forming 2 (S2). The outer peripheral portion is fixed to the inner peripheral portion of the diaphragm 1 (12) through the edge 3 (14a) and elastically supported, the inner peripheral portion is provided on the outer peripheral portion of the diaphragm 2 (13) The diaphragm 3 14 is configured to support the edge 13a, and further provides a separate annulus Y2 between the annulus Y1 of the yoke Y and the protruding outer circumferential portion. And a coil 3 (C3) located in the space 3 (S3) between the stack of the top plate 3 (T3) and the annulus (Y1). 2. The electroacoustic transducer of claim 1, wherein the electroacoustic transducer is a speaker housed in an enclosure type cabinet. 2. The electroacoustic transducer of claim 1, wherein the electroacoustic transducer is a micro speaker. The electroacoustic transducer according to any one of claims 12 and 15, wherein the edges 1, 2 (12a) and (13a) support the vibration structure in a planar state.

Images